144 BOTANICAL GAZETTE [avers 
very closely resembling Pellia. It is said' to have a spermatozoid me 
larger than that of Pellia, which has heretofore been credited with the lage 
spermatozoids among the Hepatice. The new genus is known as Matinee, 
in honor of Makino the discover: Specimens without sporogonia had alreat 
been described by Stephani as Peé/ia crispata, so that the name stands 
M. crispata (St.) Miyaki.—In Proc. Amer Acad. (34: 507-534. 1899) Be 
INSON and GREENMAN publish revisions of Montanoa, Perymenium, and Ze 
uzania, long a puzzling series of Mexican and tropical American composite 
Montanoa is recognized as containing thirty-two species, nine of which are ne 
Perymenium has twenty-six species, ten of which are new, and Zalusans 
has twelve species, two of which arenew. The same authors (did. 534-50 
have published a synopsis of the genus Verdesina, which has not been treat 
as a whole since 1836 (DC. Prodr.), at which time thirty-three species wer 
recognized, all but two being American. Now the genus is conceded ue 
exclusively American, and contains 10g species, more than 7° per cent ® 
which are local. The greatest display of species 1s in the uplands of cent 
and southern Mexico, where 40 per cent. of the species are endemic. se 
synopsis twenty-five new species are described.— GREENMAN (ibid. 566-57 ; 
has published some new and critical Mexican species, the new are 
bering twenty.— ELtas NELSon has published a revision of the ph ah 
western North America. He recognizes thirty-eight species, nineteen of . 
are new. The paper is a master’s thesis in the University of Wie 
is published in the ninth report of the Wyoming Agricultural Colles 
mie, Wyoming.— E. P. BICKNELL, in continuing his studies of Sis 
(Bull. Torr. Bot. Club 26:297-300. 1899), has described four new Spi : 
from Michigan.— A. A. HELLER (bed. 312-315) has described of 
new species from western North America.—- AVEN NELSON (Erythea? * 
1899) has discussed the western species of Aragal/us (Oxytropis) Or 
eight new species ; and has also described (did. 65-70) five pa 
Oreocarya, two of Cryptanthe, and one of Allocarya.—JAREP ‘Ss a 
18. Div. Agrost. U. S. Depart. Agric.) has published a synopsis of 
Sitanion, recognizing twenty-three species, twenty of which are dei 
in in 
GUIGNARD has recently studied the reduction of chromatin wo 
sucha study 
major®, This plant has proved exceptionally favorable for suc nega” 
the number of chromosomes, twelve in the sporophyte and six in! 
phyte, is the smallest yet reported for any flowering plant. al 
First division.—In the prophase the spirem splits longi a 
segments into six primary chromosomes each of which consists © shor? 
During the succeeding contraction and growth, each 
of these pieces° : 
9 fas major Aree 
: Le développement du pollen et la réduction dans le Nee 
microscopique 2 : 455-509. 1899. 
